Poorly.
More seriously, I didn't know I had ADHD, but I'd kind of naturally contorted my world to support it as best as I could. I worked flexible, four months contracts. I only worked in low-stakes positions where leaving after a few months was expected. When I was a young kid, I was really good at convincing teachers that they didn't need to see my homework or that I needed an extra day, because even though the work was trivial, I wouldn't do it until the day after a deadline.
I've minimized obligations where I can, like autopay for every bill, I don't drive to avoid having to take it to the shop and do maintenance, I rent so that I'm not on the hook for maintenance, and I chronically overthink purchases to avoid impulse spending most of the time, at the sacrifice of not getting things I probably need.
I'm still working on it, but I think reducing the places where you can really mess things up on a bad brain day and doing what you can to nurture an environment where you can follow your rhythms is important. Way easier said than done, of course.